I'm sorry, don't have time to look further, just realized the time, but the feature you're describing is called "pointer wrap" or "pointer wrapping". Apparently there's an app called Edgeless that does that. Have to get home!
Behemoth - Plex server
Galactica - FreeNAS
Pegasus - R710 ESX host
fsociety - MBP 15
Rocinante - E5530 testing machine
Saratoga, Ticonderoga, BunkerHill - the Hydra desktop PC-thing.